Was far simpler than I thought - I just changed the membership, role, and db.configs to point to my existing web.config settings and everything worked great. Had to do two things first, add myself to Administrators and sync the users so all of the members got added. So far looks great! One thing I should probably do is disable the create user page from the yaf side because if they start there they wont be able to get in to fakepuppy?